Attachment for tanks



Dec. 1?, 1929. J. R. MIDDLETON ATTACHMENT FOR TANKS Filed May 31, 1928 gwvant ow $511 Ma m a -ea.-

UNITED STATES,

Pars

T series JOHN It. MIDDLETON, OF BOISE, IDAHO ATTACHMENT Fon TANKS Appli'cation m Ma er thereof. Ordinarily, the contents of the fuel.

tanks of automobiles are guarded merely by a cap which may be readily unscrewed and removed so that the-fuel may be withdrawn by siphoning. The present invention has for its particular purpose the provision of means whereby the introduction of siphon tubes into the tanks will be efli'ectually and positively prevented.

- The device, according to the present invention may be applied to any tank having a filling opening at its topor at least above the maximum liquid level.

The device may be applied to the tank in the course of manufacture of the latter or it may be sold as an accessory for replacing the customary filling neck.

The invention may take various forms and two embodiments have been shown in the accompanying drawings. In these drawings:

Figure 1 is a vertical cross section through one form of the device according to my invention, the device being shown as attached to i the upper wall of a tank.

. Figure 2 is a cross section on the.line 22 of Figure 1, and

Figure 3 is a vertical section through a modified form ofdevice. 7

Referring now to the drawings, the numeral 10 indicates a section of a fuel tank immediately adjacent the filling opening thereof and 11 indicates a tubular member extending principally above the tank and arranged in the filling opening. This tubular member is provided with a large number of perforations 12 and has secured across its upper enda solid wall 13. Elements 11 and 13 form in effect an invertedcup whose side walls are perforate and whose end wall is 'imperforate. A

neck 14 has a bulb like lower portion 15 which surrounds the cup-like member and the lower converging walls of this bulb-shaped portion meet the lower portion of the cup-like member to form a tight joint therewith.

'Elements15 and 1-1 are securely attached to each other and to the top wall 10 of the tank '60 in the position shown, and it is immaterial position designated'in dotted lines as 10.

, 1928. Serial No. 281,73.

what attachment means are used so long as tight joints are secured. The upper end of neck 14 is threaded'so that a cap 16 may be screwed thereon.

The relation'of the parts described is such that when cap 16 is removed an ordinary fill mg nozzle 17 may be inserted in the neck in the position indicated in dotted lines. It is obvious that with this arrangement shoulder 18 will prevent the accidental displacement of so the nozzle. The combined area of apertures 12 is sufiicient to permit the ready flow of said fuel therethrough without backing up in element 15. w

. It is obvious that without any modification as of the described device or departure from the invention, the bulb-shaped portion of the neck may be positioned within the tank so that the top wall of the latter would take the relative According to the modification shown in Figure 3, the-cup-like member is exactly the same as shown in Figures 1 and 2, and the to 10 of the fuel tank has the same relative p0s1-- tion thereto. In this instahce, however, the 15 cup-like member is arranged within and concentrically with a cylindrical neck 20 whose lower flanged edge 21 is secured to the Wall 10 of the tank. The upper end of the tank 20 is adapted to receive a cap 22 in the usual man lac ner.

Outside of the specific combination of parts shown, an important feature of my invention lies in the provision of the solid transverse wall 13 which prevents direct access to theinterior of the tank axially of the filling neck. The absence of perforations in this wall makes it impossible to directly insert a tube of the smallest diameter and'it would be quiteas impossible to insert such tube through the lat- W eral perforations. I consider the provision of this-imperforate wall'as an important art of my invention, regardless of the specific arrangement of the filling necks, as 14 or 20,

relative to the wall so long as the wall serves to prevent direct access to the tank axially of the neck. Consequently, it will be understood that my invention may assume many forms other than those illustrated without departure from the spirit thereof.

I claim: p 1. The combination with a tank having a filling opening, of a neck secured to the tank a substantially coaxially vwith the filling open-' ing, said neck having a lower bulb-shaped portion, an inverted cup-like member. within said-portion, the lower converging walls of the latter being secured 'to the lower portion of said member, the side walls of said member Within said portion beingprovided with perforations and the end wall thereof being imperforate.

2. The combination with a tank having a "filling opening, of a neck secured to the tank.

" substantially coaxially with the fillingopening, said neck'ha-ving a lower bulb-shaped portion, an inverted cup-like member within said porti0n,fsaid member having substantially the same diameter as the neck, theslower converging walls of the latter being secured to the lower portion of the said member, the

1 side walls of said member within said portion being provided with perforationsand the end wall being im erforate.

3. The com ination with a tank having a filling opening, of a neck secured to the tank substantially coaxially to said opening, an inverted cup-like member within said neck at theinner'end of the latter, the side walls of 3 said member'being spaced from the walls of the neck and being provided with perforations, the top wall of said member being imperforate, said neck projecting considerably beyond said member and being of such diame- E ter as to prevent access to the perforate side walls of the latter, and said neck being joined to said member by an imperforate wall extending to the lower portion of the latter.

.In testimony whereof I have hereunto set 49 my hand; I

JOHN R. MIDDLETON. 

